A bed is a piece of furniture or location primarily used as a place to
sleep, but can serve other functions, such as providing a place for
sexual intercourse or for
relaxation. Beds come in a wide array of shapes and sizes. Early beds were little more than piles of
straw or some other natural materials. An important change was raising them off the ground, to avoid drafts, dirt, and pests.To make beds more comfortable, the top layer is frequently a
mattress. Originally these were bags of straw for most people and filled with
feathers for the
wealthy. Eventually new fillings such as
cotton and artificial fillers became common. In modern times most mattresses use
springs, solid
foam, latex, water, or air.
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